Parentheses.
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diff --git a/devel/ftoption.h b/devel/ftoption.h
index 2360ec6..d20df81 100644
--- a/devel/ftoption.h
+++ b/devel/ftoption.h
@@ -632,7 +632,7 @@ FT_BEGIN_HEADER
/* */
/* #define TT_CONFIG_OPTION_SUBPIXEL_HINTING 1 */
/* #define TT_CONFIG_OPTION_SUBPIXEL_HINTING 2 */
-#define TT_CONFIG_OPTION_SUBPIXEL_HINTING 1 | 2
+#define TT_CONFIG_OPTION_SUBPIXEL_HINTING ( 1 | 2 )
/*************************************************************************/
diff --git a/include/freetype/config/ftoption.h b/include/freetype/config/ftoption.h
index 1447908..7dd3f55 100644
--- a/include/freetype/config/ftoption.h
+++ b/include/freetype/config/ftoption.h
@@ -632,7 +632,7 @@ FT_BEGIN_HEADER
/* */
/* #define TT_CONFIG_OPTION_SUBPIXEL_HINTING 1 */
#define TT_CONFIG_OPTION_SUBPIXEL_HINTING 2
-/* #define TT_CONFIG_OPTION_SUBPIXEL_HINTING 1 | 2 */
+/* #define TT_CONFIG_OPTION_SUBPIXEL_HINTING ( 1 | 2 ) */
/*************************************************************************/
diff --git a/include/freetype/ftotval.h b/include/freetype/ftotval.h
index c678ef3..3e6e18d 100644
--- a/include/freetype/ftotval.h
+++ b/include/freetype/ftotval.h
@@ -106,12 +106,12 @@ FT_BEGIN_HEADER
#define FT_VALIDATE_JSTF 0x1000
#define FT_VALIDATE_MATH 0x2000
-#define FT_VALIDATE_OT FT_VALIDATE_BASE | \
- FT_VALIDATE_GDEF | \
- FT_VALIDATE_GPOS | \
- FT_VALIDATE_GSUB | \
- FT_VALIDATE_JSTF | \
- FT_VALIDATE_MATH
+#define FT_VALIDATE_OT ( FT_VALIDATE_BASE | \
+ FT_VALIDATE_GDEF | \
+ FT_VALIDATE_GPOS | \
+ FT_VALIDATE_GSUB | \
+ FT_VALIDATE_JSTF | \
+ FT_VALIDATE_MATH )
/**********************************************************************
*